Florida's Everglades National Park is one of the last great wildlife refuges in the U.S., home to numerous endangered animals and plants, as well as alligators. But the park has become a dumping ground for a variety of non-native species, including what may be tens of thousands of Burmese pythons. Some were intentionally released by pet owners, others were set free when hurricanes hit Florida's animal warehouses. Pythons have moved into their new home with a vengeance, thriving in the protected wilderness and disrupting its delicate ecosystem. Follow scientists and snake hunters as they study the problem and try to find solutions to the growing crisis.